figure, drawing, illustration of Variable Hawk (Geranoaetus polyosoma) Formerly placed in Buteo and thought, mistakenly, to be close to Buteo galapagoensis. Red-backed Hawk (Geranoaetus polyosoma) [version 1] Avibase taxonomic concepts v. 01 (August ): Red-backed Hawk (Buteo polyosoma) [version 1]. Red-backed Hawk (Buteo polyosoma) English Wikipedia has an article on: Proper noun. Buteo polyosoma m. A taxonomic species within the family.
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Earthwormsweevilsorthopterans and other invertebrates are often taken. Rufous crab hawk Common black hawk Cuban black hawk Great black hawk Savanna hawk. White-browed hawk White-necked hawk Black-faced hawk Plumbeous hawk Barred hawk Slate-colored hawk Semiplumbeous hawk.
In other projects Wikimedia Commons Wikispecies. Avibase checklists Butro Avibase search Browse by families Contribute There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages. They are most often seen soaring on warm thermals but may be seen on almost any type of raised perch from sign posts to large trees.
Avibase has been visited , times since 24 June Bibliography Only subscribers are able to see the bibliography. They build large stick nests on any elevated structure available, and sometimes breed cooperatively.
The nestlings fledge anywhere from 40 to 74 days. To register to myAvibase click here.
If poecilochrous treated as a full species, it would presumably include the newly described fjeldsai R as a race. Female in the Falkland Islands. Pale morphs are popyosoma below and gray above; in this morph, females also have a red back.
True to its English name, a highly variable, polymorphic hawk with longish wings and legs and medium-length tail Habitat Occupies open and semi-open habitats across broad range of elevations and topographies, from Formerly placed in Buteo and thought, mistakenly, to be close to Buteo galapagoensis which see and to include Buteo ventralis as colour morph see that species.
Only subscribers are able to see the bibliography. Status poorly known, but in general appears to be relatively secure, and locally common, although thought to be declining This page was last edited on 26 Julyat The Juan Fernandez race is found on the islands’ volcanic slopes and barren grazed grasslands at all elevations.
Its taxonomy is disputed, with some splitting it into the widespread red-backed hawk G. Harris’s hawk White-rumped hawk. Variable Hawk Geranoaetus polyosoma.
Red-backed Hawk (Subspecies Buteo polyosoma polyosoma) ·
The name variable hawk is fully polyisoma, as both sexes occur in several morphs. Handbook of the Birds of the World Alive. Size is also variable in this confusing species. Contribute There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages.
Skip to main content. Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use.
Smaller numbers of polyosoka latter race may visit mountain scrub and stunted Polylepis woodland at as low m but rarely below 2, m. Re-split Buteo poecilochrous from B.
Articles polyooma ‘species’ microformats Taxonbar pages without Wikidata taxon IDs Taxonbars with automatically added original combinations.
Movements Some populations composed of residents, others of partial migrants.